Pocketmine-mp: Gamemode text output issue on client

[L3ice]

Issue description

When you change the gamemode of a player via command, it does not show to which gamemode it was changed.

Steps to reproduce the issue

1. Change gamemode from the server or the client
2. Look at the output on the client

OS and versions

• PocketMine-MP: https://github.com/pmmp/PocketMine-MP/commit/557257baed69b8d77e8188ca133f611c8453ab60
• PHP: 7
• Server OS: Windows 10
• Game version: Win 10 & PE

Crashdump, backtrace or other files

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[Awzaw]

this can be fixed by setting force-language to true in pocketmine.yml

[L3ice]

But using the language files from pocketmine is not a good solution if u have clients with different languages