[Resuelto] Translate Buscar en -> Search button, spanish version

Background of the issue:
When importing translated XLIFF files, I have an issue with the translation of the 'Search' button. It is currently translated to 'Buscar en', but it should be 'Buscar'. I have searched globally within all XLIFF files and removed es.po and es.mo files. I cannot find 'buscar en' in string translations or in the traveler configuration.

Symptoms:
The 'Search' button is incorrectly translated to 'Buscar en' instead of 'Buscar'.

Questions:
Where should I translate the 'Search' button to correct the translation from 'Buscar en' to 'Buscar'?