New module commercial_invoice for preparing and printing commercial invoices.

commercial_invoice/__init__.py

@@ -0,0 +1,4 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+from . import report
+from . import models

commercial_invoice/__manifest__.py

@@ -0,0 +1,32 @@
+{
+    'name': 'Commercial Invoice',
+    'version': '1.0',
+    'category': 'Accounting',
+    'summary': 'Generate commercial invoices for cross-border shipments',
+    'description': """
+        Generate commercial invoices for cross-border shipments between Canada and the USA.
+        Features:
+        - Group multiple invoices into a single commercial invoice
+        - Track additional costs (packaging, freight, insurance)
+        - Print bilingual commercial invoice reports
+    """,
+    'author': 'marc@bemade.org',
+    'website': 'https://www.bemade.org',
+    'license': 'LGPL-3',
+    'depends': [
+        'account',
+        'stock_delivery',
+        'mail',
+    ],
+    'data': [
+        'security/ir.model.access.csv',
+        'data/commercial_invoice_sequence.xml',
+        'report/commercial_invoice_report.xml',
+        'report/report_templates.xml',
+        'views/account_move_views.xml',
+        'views/commercial_invoice_views.xml',
+    ],
+    'installable': True,
+    'application': False,
+    'auto_install': False,
+}

commercial_invoice/data/commercial_invoice_sequence.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <data noupdate="1">
+        <record id="seq_commercial_invoice" model="ir.sequence">
+            <field name="name">Commercial Invoice</field>
+            <field name="code">commercial.invoice</field>
+            <field name="prefix">CI/%(year)s/</field>
+            <field name="padding">4</field>
+            <field name="company_id" eval="False"/>
+        </record>
+    </data>
+</odoo>

commercial_invoice/models/__init__.py

@@ -0,0 +1,2 @@
+from . import commercial_invoice
+from . import account_move

commercial_invoice/models/account_move.py

@@ -0,0 +1,15 @@
+from odoo import models
+
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    def action_create_commercial_invoice(self):
+        """Create a commercial invoice from selected invoices."""
+        commercial_invoice = self.env['commercial.invoice'].create_from_invoices(self)
+        return {
+            'type': 'ir.actions.act_window',
+            'res_model': 'commercial.invoice',
+            'res_id': commercial_invoice.id,
+            'view_mode': 'form',
+            'target': 'current',
+        }

commercial_invoice/models/commercial_invoice.py

@@ -0,0 +1,114 @@
+from odoo import api, fields, models, _
+from odoo.exceptions import UserError
+
+class CommercialInvoice(models.Model):
+    _name = 'commercial.invoice'
+    _description = 'Commercial Invoice for Export'
+    _inherit = ['mail.thread', 'mail.activity.mixin']
+    _order = 'date desc, id desc'
+
+    name = fields.Char(string='Reference', required=True, copy=False, readonly=True, default='New')
+    date = fields.Date(string='Export Date', required=True, default=fields.Date.context_today)
+    state = fields.Selection([
+        ('draft', 'Draft'),
+        ('done', 'Done'),
+        ('cancelled', 'Cancelled')
+    ], string='Status', default='draft', tracking=True)
+
+    # Related parties
+    partner_id = fields.Many2one('res.partner', string='Consignee', required=True)
+    importer_id = fields.Many2one('res.partner', string='Importer of Record')
+    customs_broker_id = fields.Many2one('res.partner', string='Customs Broker')
+    company_id = fields.Many2one('res.company', string='Company', required=True, default=lambda self: self.env.company)
+    currency_id = fields.Many2one('res.currency', string='Currency', required=True,
+                                 default=lambda self: self.env.company.currency_id)
+    related_parties = fields.Boolean(string='Related Parties', default=False)
+
+
+    # Invoice lines and related fields
+    invoice_ids = fields.Many2many('account.move', string='Invoices', domain=[('move_type', '=', 'out_invoice')])
+    payment_term_id = fields.Many2one('account.payment.term', string='Payment Terms')
+    incoterm_id = fields.Many2one('account.incoterms', string='Incoterms')
+
+    # Shipping details
+    number_of_packages = fields.Integer(string='Number of Packages')
+    total_weight = fields.Float(string='Total Weight (kg)')
+    packaging_cost = fields.Monetary(string='Packaging Cost', currency_field='currency_id')
+    freight_cost = fields.Monetary(string='Freight Cost', currency_field='currency_id')
+    insurance_cost = fields.Monetary(string='Insurance Cost', currency_field='currency_id')
+    other_cost = fields.Monetary(string='Other Costs', currency_field='currency_id')
+
+    # Computed fields
+    invoice_amount = fields.Monetary(string='Invoice Amount', currency_field='currency_id',
+                                   compute='_compute_amounts', store=True)
+    total_amount = fields.Monetary(string='Total Amount', currency_field='currency_id',
+                                 compute='_compute_amounts', store=True)
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            if vals.get('name', 'New') == 'New':
+                vals['name'] = self.env['ir.sequence'].next_by_code('commercial.invoice') or 'New'
+        return super().create(vals_list)
+
+    @api.depends('invoice_ids', 'packaging_cost', 'freight_cost', 'insurance_cost', 'other_cost')
+    def _compute_amounts(self):
+        for record in self:
+            record.invoice_amount = sum(record.invoice_ids.mapped('amount_total'))
+            record.total_amount = (record.invoice_amount + record.packaging_cost + 
+                                 record.freight_cost + record.insurance_cost + record.other_cost)
+
+    def action_confirm(self):
+        self.write({'state': 'done'})
+
+    def action_draft(self):
+        self.write({'state': 'draft'})
+
+    def action_cancel(self):
+        self.write({'state': 'cancelled'})
+
+    @api.onchange('partner_id')
+    def _onchange_partner_id(self):
+        if self.partner_id:
+            self.payment_term_id = self.partner_id.property_payment_term_id
+
+    @api.model
+    def _prepare_commercial_invoice_from_invoices(self, invoices):
+        """Prepare commercial invoice values from a set of invoices."""
+        if not invoices:
+            raise UserError(_("No invoices selected."))
+
+        # Get unique values for key fields
+        currencies = invoices.mapped('currency_id')
+        payment_terms = invoices.mapped('invoice_payment_term_id')
+        incoterms = invoices.mapped('invoice_incoterm_id')
+        companies = invoices.mapped('company_id')
+
+        # Validate consistency
+        if len(currencies) > 1:
+            raise UserError(_("Selected invoices have different currencies."))
+        if len(companies) > 1:
+            raise UserError(_("Selected invoices are from different companies."))
+
+        # Get shipping and billing partners
+        shipping_partners = invoices.mapped('partner_shipping_id.commercial_partner_id')
+        billing_partners = invoices.mapped('partner_id.commercial_partner_id')
+
+        # Prepare values
+        vals = {
+            'invoice_ids': [(6, 0, invoices.ids)],
+            'company_id': companies[0].id,
+            'currency_id': currencies[0].id,
+            'partner_id': shipping_partners[0].id if len(shipping_partners) == 1 else False,
+            'importer_id': billing_partners[0].id if len(billing_partners) == 1 else False,
+            'payment_term_id': payment_terms[0].id if len(payment_terms) == 1 else False,
+            'incoterm_id': incoterms[0].id if len(incoterms) == 1 else False,
+        }
+
+        return vals
+
+    @api.model
+    def create_from_invoices(self, invoices):
+        """Create a commercial invoice from a set of invoices."""
+        vals = self._prepare_commercial_invoice_from_invoices(invoices)
+        return self.create(vals)

commercial_invoice/report/__init__.py

@@ -0,0 +1,2 @@
+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.

commercial_invoice/report/commercial_invoice_report.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="action_report_commercial_invoice" model="ir.actions.report">
+        <field name="name">Commercial Invoice</field>
+        <field name="model">commercial.invoice</field>
+        <field name="report_type">qweb-pdf</field>
+        <field name="report_name">commercial_invoice.report_commercial_invoice</field>
+        <field name="report_file">commercial_invoice.report_commercial_invoice</field>
+        <field name="print_report_name">'Commercial Invoice - %s' % object.name</field>
+        <field name="binding_model_id" ref="model_commercial_invoice"/>
+        <field name="binding_type">report</field>
+    </record>
+</odoo>

commercial_invoice/report/report_templates.xml

@@ -0,0 +1,219 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <!-- Main template that will be called by the action -->
+    <template id="report_commercial_invoice">
+        <t t-call="web.html_container">
+            <t t-foreach="docs" t-as="o">
+                <t t-call="commercial_invoice.report_commercial_invoice_document"/>
+            </t>
+        </t>
+    </template>
+
+    <!-- Document template with the actual content -->
+    <template id="report_commercial_invoice_document">
+        <t t-call="web.external_layout">
+            <div class="page">
+                <h2 class="text-center">Commercial Invoice / Facture Commerciale</h2>
+                
+                <!-- Header Info -->
+                <table class="table table-sm table-bordered mt-4">
+                    <tr>
+                        <td width="33%">
+                            <strong>Export Date / Date d'exportation:</strong><br/>
+                            <span t-field="o.date"/>
+                        </td>
+                        <td width="33%">
+                            <strong>Invoice # / No. de facture:</strong><br/>
+                            <span t-field="o.name"/>
+                        </td>
+                        <td width="33%">
+                            <strong>Related Parties / Parties liées:</strong><br/>
+                            <span t-out="'Yes / Oui' if o.related_parties else 'No / Non'"></span>
+                        </td>
+                    </tr>
+                </table>
+
+                <!-- Shipper/Consignee -->
+                <table class="table table-sm table-bordered">
+                    <tr>
+                        <td width="50%">
+                            <strong>Shipper/Exporter - Expéditeur/Exportateur:</strong><br/>
+                            <div t-field="o.company_id.partner_id" t-options='{"widget": "contact", "fields": ["name", "address"], "no_marker": True}'/>
+                            <div t-if="o.company_id.vat">Tax ID: <span t-field="o.company_id.vat"/></div>
+                        </td>
+                        <td width="50%">
+                            <strong>Consignee - Destinataire:</strong><br/>
+                            <div t-field="o.partner_id" t-options='{"widget": "contact", "fields": ["name", "address"], "no_marker": True}'/>
+                            <div t-if="o.partner_id.vat">Tax ID: <span t-field="o.partner_id.vat"/></div>
+                        </td>
+                    </tr>
+                </table>
+
+                <!-- Export/Terms/Currency -->
+                <table class="table table-sm table-bordered">
+                    <tr>
+                        <td width="33%">
+                            <strong>Country of Export / Pays d'exportation:</strong><br/>
+                            <span t-field="o.company_id.country_id.name"/>
+                        </td>
+                        <td width="33%">
+                            <strong>Terms of Sale / Conditions de vente:</strong><br/>
+                            <span t-field="o.payment_term_id.name"/>
+                        </td>
+                        <td width="33%">
+                            <strong>Currency / Devise:</strong><br/>
+                            <span t-field="o.currency_id.name"/>
+                        </td>
+                    </tr>
+                </table>
+
+                <!-- Origin/Importer -->
+                <table class="table table-sm table-bordered">
+                    <tr>
+                        <td width="50%">
+                            <strong>Country of Origin / Pays d'origine:</strong><br/>
+                            <t t-set="all_lines" t-value="o.invoice_ids.mapped('invoice_line_ids')"/>
+                            <t t-set="origins" t-value="all_lines.mapped('product_id.country_of_origin.name')"/>
+                            <span t-out="', '.join([x for x in origins if x])"/>
+                        </td>
+                        <td width="50%" rowspan="2">
+                            <strong>Importer of Record / Importateur attitré:</strong><br/>
+                            <span>(if different than consignee / si différent du destinataire)</span><br/>
+                            <t t-if="o.importer_id != o.partner_id">
+                                <div t-field="o.importer_id" t-options='{"widget": "contact", "fields": ["name", "address"], "no_marker": True}'/>
+                            </t>
+                        </td>
+                    </tr>
+                    <tr>
+                        <td>
+                            <strong>Country of Ultimate Destination / Pays de destination finale:</strong><br/>
+                            <span t-field="o.partner_id.country_id.name"/>
+                        </td>
+                    </tr>
+                </table>
+
+                <!-- Line Items -->
+                <table class="table table-sm table-bordered mt-4">
+                    <thead>
+                        <tr>
+                            <th>Item # &amp; Description<br/>No. d'article &amp; description</th>
+                            <th>Client Item #<br/>No. d'article client</th>
+                            <th>HS #<br/>No. SH</th>
+                            <th>Quantity<br/>Quantité</th>
+                            <th>Unit Value<br/>Valeur unitaire</th>
+                            <th>Total Value<br/>Valeur totale</th>
+                        </tr>
+                    </thead>
+                    <tbody>
+                        <t t-set="all_lines" t-value="o.invoice_ids.mapped('invoice_line_ids')"/>
+                        <tr t-foreach="all_lines" t-as="line">
+                            <td>
+                                <span t-field="line.product_id.name"/>
+                                <t t-if="line.name != line.product_id.name">
+                                    <br/><span class="text-muted" t-field="line.name"/>
+                                </t>
+                            </td>
+                            <td><span t-field="line.product_id.default_code"/></td>
+                            <td><span t-field="line.product_id.hs_code"/></td>
+                            <td>
+                                <span t-field="line.quantity"/>
+                                <span t-field="line.product_uom_id" groups="uom.group_uom"/>
+                            </td>
+                            <td>
+                                <span t-field="line.price_unit" t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
+                            </td>
+                            <td>
+                                <span t-field="line.price_subtotal" t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
+                            </td>
+                        </tr>
+                    </tbody>
+                </table>
+
+                <!-- Costs and Totals -->
+                <div class="row">
+                    <div class="col-7">
+                        <!-- Declaration -->
+                        <p class="small">
+                            These commodities, technology or software were exported from Canada in accordance with the Export
+                            Administration Regulations. Diversion contrary to Canadian law prohibited.<br/>
+                            It is hereby certified that this invoice shows the actual price of the goods described, that no other invoice has
+                            been issued and that all particulars are true and correct.<br/>
+                            ----------------------------------------------------------------------------<br/>
+                            Ces marchandises, technologies ou logiciels ont été exportés du Canada conformément aux règlements
+                            administratifs sur l'exportation des Etats-Unis. Tout agissement contraire à la loi Canadienne est strictement
+                            interdit.<br/>
+                            Je certifie par la présente que les prix indiqués sur cette facture sont exacts, qu'aucune autre facture
+                            commerciale n'a été produite et que tous les renseignements fournis sont véridiques.
+                        </p>
+                        <!-- Signature -->
+                        <div class="mt-4">
+                            <div>Signature: _______________________</div>
+                            <div>Title / Titre: _______________________</div>
+                            <div>Date: _______________________</div>
+                        </div>
+                    </div>
+                    <div class="col-5">
+                        <table class="table table-sm">
+                            <tr>
+                                <td><strong>Packaging / Emballage:</strong></td>
+                                <td class="text-right">
+                                    <span t-field="o.packaging_cost" t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
+                                </td>
+                            </tr>
+                            <tr>
+                                <td><strong>Freight / Fret:</strong></td>
+                                <td class="text-right">
+                                    <span t-field="o.freight_cost" t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
+                                </td>
+                            </tr>
+                            <tr>
+                                <td><strong>Insurance / Assurance:</strong></td>
+                                <td class="text-right">
+                                    <span t-field="o.insurance_cost" t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
+                                </td>
+                            </tr>
+                            <tr>
+                                <td><strong>Other / Autre:</strong></td>
+                                <td class="text-right">
+                                    <span t-field="o.other_cost" t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
+                                </td>
+                            </tr>
+                            <tr class="border-black">
+                                <td><strong>Total Invoice Value / Valeur totale de la facture:</strong></td>
+                                <td class="text-right">
+                                    <strong t-field="o.total_amount" t-options='{"widget": "monetary", "display_currency": o.currency_id}'/>
+                                </td>
+                            </tr>
+                        </table>
+                    </div>
+                </div>
+
+                <!-- Footer Info -->
+                <table class="table table-sm table-bordered mt-4">
+                    <tr>
+                        <td width="33%">
+                            <strong>Customs Broker / Courtier en douane:</strong><br/>
+                            <span t-field="o.customs_broker_id.name"/>
+                        </td>
+                        <td width="33%">
+                            <strong>Number of Packages / Nombre de colis:</strong><br/>
+                            <span t-field="o.number_of_packages"/>
+                        </td>
+                        <td width="33%">
+                            <strong>Total Weight / Poids total:</strong><br/>
+                            <span t-field="o.total_weight"/> kg
+                        </td>
+                    </tr>
+                    <tr>
+                        <td colspan="3">
+                            <strong>Incoterms:</strong>
+                            <t t-if="o.incoterm_id">
+                                <span t-field="o.incoterm_id.code"/> - <span t-field="o.incoterm_id.name"/>
+                            </t>
+                        </td>
+                    </tr>
+                </table>
+            </div>
+        </t>
+    </template>
+</odoo>

commercial_invoice/security/ir.model.access.csv

@@ -0,0 +1,3 @@
+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+access_commercial_invoice_user,commercial.invoice.user,model_commercial_invoice,account.group_account_invoice,1,1,1,1
+access_commercial_invoice_manager,commercial.invoice.manager,model_commercial_invoice,account.group_account_manager,1,1,1,1

commercial_invoice/views/account_move_views.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="view_move_list_inherit_commercial_invoice" model="ir.ui.view">
+        <field name="name">account.move.list.commercial.invoice</field>
+        <field name="model">account.move</field>
+        <field name="inherit_id" ref="account.view_out_invoice_tree"/>
+        <field name="arch" type="xml">
+            <xpath expr="//list" position="inside">
+                <header>
+                    <button name="action_create_commercial_invoice" 
+                            type="object" 
+                            string="Create Commercial Invoice"/>
+                </header>
+            </xpath>
+        </field>
+    </record>
+</odoo>

commercial_invoice/views/commercial_invoice_views.xml

@@ -0,0 +1,128 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <!-- Tree View -->
+    <record id="commercial_invoice_view_tree" model="ir.ui.view">
+        <field name="name">commercial.invoice.tree</field>
+        <field name="model">commercial.invoice</field>
+        <field name="arch" type="xml">
+            <list string="Commercial Invoices" decoration-info="state == 'draft'" decoration-muted="state == 'cancelled'">
+                <field name="name"/>
+                <field name="date"/>
+                <field name="partner_id"/>
+                <field name="invoice_amount"/>
+                <field name="total_amount"/>
+                <field name="currency_id" invisible="1"/>
+                <field name="state"/>
+            </list>
+        </field>
+    </record>
+
+    <!-- Form View -->
+    <record id="commercial_invoice_view_form" model="ir.ui.view">
+        <field name="name">commercial.invoice.form</field>
+        <field name="model">commercial.invoice</field>
+        <field name="arch" type="xml">
+            <form string="Commercial Invoice">
+                <header>
+                    <button name="action_confirm" string="Confirm" type="object" class="oe_highlight"
+                            invisible="state != 'draft'"/>
+                    <button name="action_draft" string="Reset to Draft" type="object"
+                            invisible="state == 'draft'"/>
+                    <button name="action_cancel" string="Cancel" type="object"
+                            invisible="state == 'cancelled'"/>
+                    <button name="%(action_report_commercial_invoice)d" string="Print" type="action" class="oe_highlight"/>
+                    <field name="state" widget="statusbar"/>
+                </header>
+                <sheet>
+                    <div class="oe_title">
+                        <h1>
+                            <field name="name" readonly="1"/>
+                        </h1>
+                    </div>
+                    <group>
+                        <group>
+                            <field name="partner_id" readonly="state != 'draft'"/>
+                            <field name="importer_id" readonly="state != 'draft'"/>
+                            <field name="customs_broker_id" readonly="state != 'draft'"/>
+                            <field name="payment_term_id" readonly="state != 'draft'"/>
+                            <field name="incoterm_id" readonly="state != 'draft'"/>
+                        </group>
+                        <group>
+                            <field name="date" readonly="state != 'draft'"/>
+                            <field name="company_id" groups="base.group_multi_company" readonly="state != 'draft'"/>
+                            <field name="currency_id" groups="base.group_multi_currency" readonly="state != 'draft'"/>
+                            <field name="number_of_packages" readonly="state != 'draft'"/>
+                            <field name="total_weight" readonly="state != 'draft'"/>
+                        </group>
+                    </group>
+                    <notebook>
+                        <page string="Invoices" name="invoices">
+                            <field name="invoice_ids" readonly="state != 'draft'">
+                                <list>
+                                    <field name="name" readonly="1"/>
+                                    <field name="partner_id" readonly="1"/>
+                                    <field name="invoice_date" readonly="1"/>
+                                    <field name="amount_total" readonly="1"/>
+                                </list>
+                            </field>
+                            <group class="oe_subtotal_footer">
+                                <field name="invoice_amount" class="oe_subtotal_footer_separator"/>
+                                <field name="packaging_cost"  widget="monetary"/>
+                                <field name="freight_cost"  widget="monetary"/>
+                                <field name="insurance_cost" widget="monetary"/>
+                                <field name="other_cost"  widget="monetary"/>
+                                <field name="total_amount" class="oe_subtotal_footer_separator" widget="monetary"/>
+                            </group>
+                        </page>
+                    </notebook>
+                </sheet>
+                <chatter/>
+            </form>
+        </field>
+    </record>
+
+    <!-- Search View -->
+    <record id="commercial_invoice_view_search" model="ir.ui.view">
+        <field name="name">commercial.invoice.search</field>
+        <field name="model">commercial.invoice</field>
+        <field name="arch" type="xml">
+            <search string="Search Commercial Invoices">
+                <field name="name"/>
+                <field name="partner_id"/>
+                <field name="invoice_ids"/>
+                <filter string="Draft" name="draft" domain="[('state','=','draft')]"/>
+                <filter string="Done" name="done" domain="[('state','=','done')]"/>
+                <group expand="0" string="Group By">
+                    <filter string="Status" name="status" context="{'group_by':'state'}"/>
+                    <filter string="Partner" name="partner" context="{'group_by':'partner_id'}"/>
+                    <filter string="Date" name="date" context="{'group_by':'date'}"/>
+                </group>
+            </search>
+        </field>
+    </record>
+
+    <!-- Action -->
+    <record id="action_commercial_invoice" model="ir.actions.act_window">
+        <field name="name">Commercial Invoices</field>
+        <field name="res_model">commercial.invoice</field>
+        <field name="view_mode">list,form</field>
+        <field name="context">{'search_default_draft': 1}</field>
+        <field name="help" type="html">
+            <p class="o_view_nocontent_smiling_face">
+                Create your first commercial invoice
+            </p>
+        </field>
+    </record>
+
+    <!-- Menu -->
+    <menuitem id="menu_commercial_invoice_root"
+              name="Commercial Invoices"
+              parent="account.menu_finance"
+              sequence="5"/>
+
+    <menuitem id="menu_commercial_invoice"
+              name="Commercial Invoices"
+              parent="menu_commercial_invoice_root"
+              action="action_commercial_invoice"
+              sequence="1"/>
+</odoo>

qc_partner_default_lang/__init__.py

@@ -0,0 +1 @@
+from . import models

qc_partner_default_lang/__manifest__.py

@@ -0,0 +1,14 @@
+{
+    'name': 'Partner Default Language by Location',
+    'version': '18.0.1.0.0',
+    'category': 'Tools',
+    'summary': 'Automatically set partner language based on state/country',
+    'author': 'Bemade',
+    'website': 'https://www.bemade.org',
+    'depends': ['base'],
+    'data': [],
+    'installable': True,
+    'application': False,
+    'auto_install': False,
+    'license': 'LGPL-3',
+}

qc_partner_default_lang/models/__init__.py

@@ -0,0 +1 @@
+from . import res_partner

qc_partner_default_lang/models/res_partner.py

@@ -0,0 +1,34 @@
+from odoo import api, models
+
+
+class ResPartner(models.Model):
+    _inherit = 'res.partner'
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            # Only set language if it's not already specified
+            if not vals.get('lang'):
+                state = vals.get('state_id')
+                country = vals.get('country_id')
+                
+                if state:
+                    state_rec = self.env['res.country.state'].browse(state)
+                    # Check if the state is Quebec
+                    if state_rec.code == 'QC' and state_rec.country_id.code == 'CA':
+                        vals['lang'] = 'fr_CA'
+                    else:
+                        vals['lang'] = 'en_US'
+                else:
+                    vals['lang'] = 'en_US'
+
+        return super().create(vals_list)
+
+    @api.onchange('state_id', 'country_id')
+    def _onchange_location_set_lang(self):
+        # Only suggest language change if it's a new record (id not set yet)
+        if not self.id and not self.lang:
+            if self.state_id and self.state_id.code == 'QC' and self.state_id.country_id.code == 'CA':
+                self.lang = 'fr_CA'
+            else:
+                self.lang = 'en_US'

qc_partner_default_lang/static/description/index.html

@@ -0,0 +1,27 @@
+<![CDATA[<section class="oe_container">
+    <div class="oe_row oe_spaced">
+        <h2 class="oe_slogan" style="color:#875A7B;">Partner Default Language by Location</h2>
+        <h3 class="oe_slogan">Automatic Language Assignment for Partners</h3>
+        <div class="oe_demo oe_picture oe_screenshot">
+            <p class="oe_mt32 text-center">
+                This module automatically sets the default language for new partners based on their location.
+            </p>
+        </div>
+    </div>
+</section>
+
+<section class="oe_container">
+    <div class="oe_row oe_spaced">
+        <div class="oe_span12">
+            <h2 class="oe_slogan" style="color:#875A7B;">Features</h2>
+            <div class="oe_demo oe_picture oe_screenshot">
+                <ul>
+                    <li>Automatically sets French (fr_CA) for partners in Quebec</li>
+                    <li>Defaults to English (en_US) for all other locations</li>
+                    <li>Works on partner creation and when updating location fields</li>
+                    <li>Respects manually set language preferences</li>
+                </ul>
+            </div>
+        </div>
+    </div>
+</section>]]>