This is usually included in the translation files. But be aware, with every update, the translation file might be updated as well and you might lose the "new" translation.
Maybe there is way to overwrite this via CSS or Javascript. Not sure though.
Help us to help you!
Provide your LS version and where it is installed (own server, uni/employer, SaaS hosting, etc.).
Always provide a LSS file (not LSQ or LSG).
Note: I answer at this forum in my spare time, I'm not a LimeSurvey GmbH employee.
