Keep the first form small
We started with two fields: “Language / 语言” and “Feedback / 反馈”. Bilingual labels help readers understand the task. They are not the same as automatic interface translation.
Test the round trip
We submitted sample values containing Chinese, English, and Spanish, then checked the saved backend record. The downloaded CSV retained the bilingual headings and the submitted characters.
Look at the narrow version
At a 390px layout width, the title wrapped and the fields and submit button remained visible. This checks one layout, not input on every real mobile device.
Keep the next questions visible
Before collecting real feedback, test notification delivery, spam controls, your privacy wording, and any conditional logic you need. These were outside this first check.