redis + non-english search

[David LevTov]

i want develop a primitive plugin for basic search non-english support (lack in dbsearch with redis).

I wish very much, good starting points:
How to scan messages already in front of the plugin (if you refer me to an existing code, please give me relevant line numbers..)?

Should I build an index somewhere in words (primitive, but better than a comprehensive scan, or not)? And if so how (existing database, with prefix?).

Thank you very much in advance!