How do I force the player in a text-based game to use an alphabet-only name?

我怎么力在一个基于文本的游戏玩家使用字母的名字？

youdao

When I got a decent Internet connection, I started playing a text-based multi-user game all in English.

当我能够上网时，我开始玩基于文本的多用户全英文游戏。

youdao

MUD is very much like the classic game ZORK, or any of the hundreds of text-based adventure video games that have flourished on personal computers since day one.

MUD这个游戏跟一款经典游戏ZORK(或者另外上百款自从个人电脑出现的第一天起就蓬勃兴旺的文字界面的探险类游戏)非常相像。

youdao

These are role-playing games that grew out of Dungeons and Dragons, an old text-based cult game that started in the 1960s.

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The game is text-based to a degree.

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But the text-based classic was one of my first video game experiences.

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