Signature In Latin Characters in Form 186

Dears,
In the signature part of form 186 it request that the signature should be in latin characters, my signatures in many documents including my passport is a mix of latin and arabic characters, so my question is what is the right thing to do??? should I sign as I sign anything else or should I sign using a different signature that has only latin characters?? and should I write my name with the signature or just the signature??

Thanks for the help