Reload translation files of Odoo modules.
git clone https://github.com/fabiomix/odoo-reload-translations.git -b 10.0 reload_translations
By default, Odoo only loads new translation terms and does not overwrite existing ones, even if the PO file has changed. This was probably a design decision, made for being able to manually change translations from the GUI without losing them with each module update.
From a developer's perspective, this is not the behavior you would expect and so this module was born. Once installed, open Settings > Translations > Reload translations and select the modules for which you want to force the reload of translation terms.
Luckily, Odoo also provides a hidden boolean option called overwrite_existing_translations
that you can add to your config file. If set to True, when updating a module
your installation will always use the translation terms present in the PO file.