Superscript 3 for mm3

Marlin/src/lcd/language/language_an.h

Marlin/src/lcd/language/language_bg.h

Marlin/src/lcd/language/language_ca.h

Marlin/src/lcd/language/language_cz.h

Marlin/src/lcd/language/language_da.h

Marlin/src/lcd/language/language_el.h

Marlin/src/lcd/language/language_el_gr.h

Marlin/src/lcd/language/language_en.h

Marlin/src/lcd/language/language_gl.h

Marlin/src/lcd/language/language_hr.h

Marlin/src/lcd/language/language_nl.h

Marlin/src/lcd/language/language_pl.h

Marlin/src/lcd/language/language_pt.h

Marlin/src/lcd/language/language_pt_br.h

Marlin/src/lcd/language/language_ru.h

Marlin/src/lcd/language/language_uk.h