Depends on your keyboard. All languages are made for keyboards of the english. Worst character in this neighborhood is "~". It is AltGr+"~" followed by spaceba

Depends on your keyboard. All languages are made for keyboards of the english. Worst character in this neighborhood is "~". It is AltGr+"~" followed by spacebar. It is same as "ã", but the "a" is replaced with " ". Takes always 3 tries to make it right.