I have to regenerate the .po file, taking the latest revision of the translation from 1.8 branche. Yes, I know how to do it
1.8 branche has a lot of translation corrections compared to the current trunk .po file.

All the necessary headers are added.

Also, I translated the 41 strings that used in the LLD. I have them specially marked as fuzzy to DotNeft then checked when Pootle it begins to work.

I am sure that he simply remove the Fuzzy flag because my translation is a high quality , but let him do it and we will get some experience of group work on the translation, and even add Richlv's graphics beauty and dynamics .

p.s. i pass 'frontend.po' through 'update_po.sh' script with added sorting option as i described in the ZBX-3326 comments:
find .. -type f -name '*.php' | sort -d -f > POTFILES.in