First of all Inkscape moved to GitLab, so the latest files will be at https://gitlab.com/inkscape/inkscape/tree/master/po
However those are for the "master" branch (i.e. most recent unstable development version or future Inkscape 0.93).
The translation files for the stable branch ("0.92.x") are at https://gitlab.com/inkscape/inkscape/tree/0.92.x/po
and there you'll find cs.po was last updated 2017-01-01, i.e. is much more current (and I think it even has some of the strings you translated)
Unfortunately translations won't "import" automatically between branches, so they have to be kept up to date side-by-side by translators (at least until somebody comes up with a very clever way how to simplify this).
First of all Inkscape moved to GitLab, so the latest files will be at /gitlab. com/inkscape/ inkscape/ tree/master/ po
https:/
However those are for the "master" branch (i.e. most recent unstable development version or future Inkscape 0.93).
The translation files for the stable branch ("0.92.x") are at /gitlab. com/inkscape/ inkscape/ tree/0. 92.x/po
https:/
and there you'll find cs.po was last updated 2017-01-01, i.e. is much more current (and I think it even has some of the strings you translated)
Unfortunately translations won't "import" automatically between branches, so they have to be kept up to date side-by-side by translators (at least until somebody comes up with a very clever way how to simplify this).