According to Richlv's recommendation i create this separate issue (this part is deleted from ZBX-2630).

I recommend to replace words combination with the full sentences "Imported successfully" and "Import failed". Why - see a picture "10_bad_words_combination.png"

Source code:
show_messages($result, S_IMPORTED.SPACE.S_SUCCESSEFULLY_SMALL, S_IMPORT.SPACE.S_FAILED_SMALL);
3 places:
frontends\php\screenconf.php:135
frontends\php\sysmaps.php:154
frontends\php\templates.php:264