Do not clear input when switching between languages

[fisker]

Clear and concise description of the problem

Sometimes switch language only because I didn't notice the language is incorrect.

Suggested solution

Only clear input if the input is empty or example code.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.