[FIX] Contract Spanish Translation

- Module: contract
    - Summary: several terms where not translated to Spanish.

contract/i18n/es.po

@@ -323,6 +323,19 @@ msgstr "Creado por"
 msgid "Created on"
 msgstr "Creado en"
 
+#. module: contract
+#: selection:account.analytic.account,contract_type:0
+#: selection:account.analytic.contract,contract_type:0
+#: model:ir.ui.view,arch_db:contract.account_analytic_account_sale_form
+msgid "Customer"
+msgstr "Cliente"
+
+#. module: contract
+#: model:ir.actions.act_window,name:contract.action_account_analytic_sale_overdue_all
+#: model:ir.ui.menu,name:contract.menu_action_account_analytic_sale_overdue_all
+msgid "Customer Contracts"
+msgstr "Contratos de cliente"
+
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_account_analytic_account_date_end
 #: model:ir.model.fields,field_description:contract.field_project_project_date_end
@@ -661,6 +674,19 @@ msgstr ""
 msgid "Sub Total"
 msgstr "Subtotal"
 
+#. module: contract
+#: selection:account.analytic.account,contract_type:0
+#: selection:account.analytic.contract,contract_type:0
+#: model:ir.ui.view,arch_db:contract.account_analytic_account_purchase_form
+msgid "Supplier"
+msgstr "Proveedor"
+
+#. module: contract
+#: model:ir.actions.act_window,name:contract.action_account_analytic_purchase_overdue_all
+#: model:ir.ui.menu,name:contract.menu_action_account_analytic_purchase_overdue_all
+msgid "Supplier Contracts"
+msgstr "Contratos de proveedor"
+
 #. module: contract
 #: model:ir.model.fields,field_description:contract.field_account_analytic_contract_line_price_unit
 #: model:ir.model.fields,field_description:contract.field_account_analytic_invoice_line_price_unit