AFAIK:
"Climb (to) Flight Level 80"
"Climb (to) 8 thousand meters standard"
are both correct and (only) proper phraseologies - for the same thing
In the metric world, the descriptor "standard" is affixed with the same meaning as "Flight Level" that we know (and like to omit) so well.
It is not an instruction to change altimeters, neither does it affect your company approved technique for doing so.