Problem with unit of energy in Bulgarian language

[Hellioob]

Hello! in Bulgarian language there are problems with unit of energy https://imgur.com/a/mGuqE2L
anywhere in the files I do not find text to change this unit.
the translation must be:
(BG) (EN)
Вт - Kilowatt
МВт - Megawatt
Вт - Watt
or it may be the original name - kW, MW, W.
Can anything be done?

[Hellioob]

I fixed it already! I had to change:

si-prefix-symbol-exa
si-prefix-symbol-giga
si-prefix-symbol-kilo
si-prefix-symbol-mega
si-prefix-symbol-peta
si-prefix-symbol-tera
si-prefix-symbol-yotta
si-prefix-symbol-zetta