Hi Aeboyd488,
We'd love to help resolve the issue you're having. Is the issue just in Pages with this specific document? If not, you may want to check your device Settings to make sure they are correct under Settings > General > Language & Region. The language can only be changed if you have more than one language selected in your devices preferred languages. Also, Spellcheck is based on the language your Keyboard is set to. To check that, go to Settings > General > Keyboards > Keyboards. If you need to change the language on the current document, follow the steps below.
"After you create a document, you can change its language setting while the document is open.
Note: You can’t change this setting for a shared document.
- Tap
in the toolbar, tap Document Options, then tap Language & Region. - Tap Language and choose a new language.

- If you choose the first item in the Language pop-up menu (System - [language]), you reset the document to the language and region of your device. If you subsequently change your device’s language setting, or if you open the document on a device with a different language setting, the document’s language and region automatically change to match the device’s. But if you share the document, all users see the document in the language and region of your device.
- Tap Region (if it’s active) and choose a region.
- Tap Done.
After you change the document’s language and region, any new table and chart data you enter reflects the new language. For existing table and chart data, the language in dates (for example, month names) changes, but the punctuation in dates and the order of the day, month, and year don’t change. The punctuation in numbers (for example, the decimal point and thousands separator) does change.
Reference: Format a document for another language in Pages on iPad
Take care.