localize databases with working searching and ordering?

It is not so easy. It is a search input, that is not restricted to one database column. You can search a term and it is looked up in serveral columns and all matching ones are shown.

You can try here: https://kh.4lima.de/routes

Colors is a translated string. So sorting and searching is wrong. Search 'schwarz' (german), you won't find anything, but search 'black' and black routes are shown.