[peoplefromibiza]

That's what I used too on Mac and it also works on Linux

AltGr+e for grave accent and AltGr+' for acute accent.

Much better than auto completion boxes

My language, as yours, contains a lot of accented letters and it would be absolutely impractical to chose them from a dropdown.

p.s. I type on an Italian keyboard with UK layout because it's more comfortable for typing code

[makapuf]

I understand you so much. Typing code on a non US keyboard (French here) is much worse. I long for a French coder layout.