Hi,

yes you can do this ,like all other languages .

generate a file en_US.po for your module and place it in i18n .change the terms you want to change.

then update your module .all original words should be changed. for example in module sale ..

#. module: sale
#: code:addons/sale/sale.py:444
#, python-format
msgid "Customer Invoices"
msgstr "Customer Invoices"   < ------- here your translation

#. module: sale
#: model:ir.actions.act_window,name:sale.open_board_sales
#: model:ir.ui.menu,name:sale.menu_dashboard_sales
#: model:process.process,name:sale.process_process_salesprocess0
#: view:res.partner:0
#: view:sale.order:0
#: view:sale.report:0
msgid "Sales"
msgstr "Sales"< ------- here your translation

#. module: sale
#: help:sale.config.settings,module_sale_margin:0
msgid "This adds the 'Margin' on sales order.\n"
"                This gives the profitability by calculating the difference between the Unit Price and Cost Price.\n"
"                This installs the module sale_margin."
msgstr "This adds the 'Margin' on sales order.\n"
"                This gives the profitability by calculating the difference between the Unit Price and Cost Price.\n"
"                This installs the module sale_margin." < ------- here your translation

#. module: sale
#: report:sale.order:0
#: field:sale.order.line,price_unit:0
msgid "Unit Price"
msgstr "Unit Price" < ------- here your translation