Katakana are also sometimes used to indicate words being spoken in a foreign or otherwise unusual accent.

She had an unusual accent, not one he'd heard before.

His voice, also, was smooth and soft, with just a hint of some unusual accent.

He had a most unusual accent, one she couldn't quite place.

He was an engaging conversationalist with an unusual, elegant accent.

He also noticed that she spoke with the same unusual accent, even in his language.

Ayla caught comments both about her unusual accent and the children.

Several, but English is a major trading language and spoken with many accents so anything unusual about yours will not be noticed.

Most of them had beards, spoke with unusual accents, and did not order grits.

Why not, then, think of the next visitor as a Spacer with an unusual accent?