A translation into some laguages and a option to change the language would be nice!

This is probably the whole side menu in german.

Note: I will use different fitting translations if i cant find a word for it.

Credits - Credits
Tokens - Tokens
Menu - Menü
Campaign - Kampagne
Multiplayer - Mehrspieler
Ladder Battle - Kampfarena (Battle Arena)
Chat - Chat (Its commonly used in german.)
Workshop - Werkstatt
Mech - Kampfroboter (Battle Robot)
Upgrades - Verbesserungen (Yeah its a long word.)
Shop - Laden
Item/s - Item/s or Teil/e (Part/s)
(Teil sounds a bit silly combined with other words so id say use Items people will know what is meant.)

Rarity - Seltenheit

Regular Items - Normale Items
Regular Item - Normales Items
Rare Items - Seltene Items
Rare Item - Seltenes Item
Epic Items - Epische Items
Epic Item - Episches Item
Legendary Items - Legendäre Items
Legendary Item - Legendäres Item
Mythical Items - Mythische Items
Mythical Item - Mythisches Item

Package/s - Paket/e
Item Box - Item Kiste (Crate,Chest,Case)
(Also Teil Kiste sounds silly.)
Silver Box - Silberkiste
Gold Box - Goldkiste
Mythical Box/es - Mythische Kiste/n
Premium Account - Premium Account
Suggestion:
Premium Mitgliedschaft (Premium Membership)
B/S/G Boost - Bronze/Silber/Gold Schub

Community - Community (Commonly used.)
Clan - Clan
Ranking List - Rangliste
News - Neuigkeiten
Forum - Forum
SMsYT Channel - SMsYT Kanal
Profile - Profil
Replays - Wiederholungen
Gift - Geschenk
(Fun fact: Gift in german is a word for poison!)
Gift Key - Geschenkcode
(Giftcode maybe sounds silly
in english but it doesn't in german.)
Achievements - Errungenschaften
Info - Informationen or just Info
Help - Hilfe
Options - Optionen
Logout - Ausloggen

They already made the german, spanish and russian translation of the game its just not updated yet. But im sure they will update soon.