[quote=@Weird Tales]
<Snipped quote by Double>

You could just have him speak normal.
[/quote]
I've already established him using Buu speak. It would be weird to suddenly change that for no reason.

[quote=@King Cosmos]
[@Double] have Momo absorb an English professor and gain the ability of good grammar.
[/quote]
Momo doesn't know about the absorption ability. At the time I figured it would keep him from just absorbing all our enemies away and becoming stupidly OP in the process.

[quote=@Reflection]
[@Double] Have him run off with Wain after the Raditz arc, and they can both come back as villains. 
[/quote]
If Wain presents a good reason for him to do so... that might actually be tempting. I take it you're not planning to use Wain for much longer either?