There are big chances that this wording might be coming from the theme's strings and probably they haven't been fully scanned yet.
1. Go to your WordPress backend
2. Go to WPML > Theme and plugins localization
3. Scroll to the "Strings in the themes" section, check the box next to your theme's name and click the blue "Scan selected themes for strings" button
4. After the scanning ends, go to WPML > String translation and search again for the words you mentioned, one by one.
You should be able to find the words now.
Regarding the form, I see that it has been created with Contact Form 7.
Practically you can simply duplicate each of the forms, translate all the content (labels, placeholder text, the messages the form shows on the screen on interaction etc.) and then use each of the unique shortcodes in the translated version of the content that you built.
Please let me know if this solved your issues or if you still need help.