General opposites:
* Non-linguist: This simply means someone who is not a linguist, but it doesn't suggest an opposing viewpoint.
* Illiterate: This implies someone who lacks the ability to read or write, but it doesn't directly contradict the expertise of a linguist.
Opposing viewpoints:
* Anti-linguist: This implies someone who actively opposes the study of language, which is unlikely.
* Language denier: This is a hypothetical term for someone who denies the existence or importance of language.
Other possibilities:
* Layperson: This refers to someone without specialized knowledge in a particular field, which could include linguistics.
* Non-specialist: This is a general term for someone who is not an expert in a particular area.
The best antonym will depend on the specific context of your use.