If you Play Minecraft With Recourse Pack and other language or type ~ Will replace with a Icon,Resource packs without a text i NOT tested
The Tested Resource Pack and Language Tested is PT-BR And The Redwood Pack(PVPTrap's Resource Pack)
In The "Configurações de Vídeo" ,The õ is Replaced by a Music Icon
Possible Minecraft or Resource Pack Error
Ressourcepack issue, contact the owner.