How to customise the translation of frontend?

I need to customize some words of the frontend, and now I can ssh to the OS and modify the original file of HA: /usr/src/homeassistant/homeassistant/components

But I cannot find the translation file of the frontend, anybody knows about where is it located?

Thanks, I just want to customize the translation file without generally using.

And below is the file path of the translation file:
Installed through HA Container: /usr/local/lib/python3.9/site-packages/hass_frontend/static
Installed through HA Core: /srv/homeassistant/lib/python3.8/site-packages/hass_frontend/static

Hello, has anyone find a solution to add some translation to the front_end ?
I develop a new climate integration and I want to add a preset (which is possible and works fine). But the front end displays localized Presets and does not have a key for my new preset.
Keys are defined here: Log in | Lokalise and I see s-the translation for pre-defined preset:

I’m not able to add a translation or I don’t find how to do this.

Thank you for any help on this topic