Obviously, the guide contains major spoilers to the in-game language system as it's meant to be a cheat sheet for all the polite sentences present in the game. Be warned.

At the time of writing this guide, the achievement related to these sentences, "So polite!", is pretty much impossible to obtain as, according to the in-game tracker, simply unlocking said sentences wouldn't give you any progress, and nobody knows the solution for it. However, rumor has it there is a way to trigger it. So I've decided to create this guide with hope of bringing in more people on it by sharing what I got and possibly solving it, and to raise awareness in general.

1. Hello. // Patto.
   
   
2. Who are you? // Asi uppa abatyk asu?
   
   
3. Follow me. // Asu uppa patera asi.
   
   
4. Wait here. // Asu uppa zahuuda.
   
   
5. Ask to use. // Asu uppa tukra pat vavi asi.
   
   
6. Ask to open. // Asu uppa padulus pat vavi asi.
   
   
7. Can I see that? // Asu zas haira si?
   
   
8. Take it. // Asu uppa pasitira pat vavi asi.
   
   
9. Put it away. // Asu uppa haira pat.
   
   
10. Push it. // Asu uppa huuda.
    
    
11. Drink it. // Asu uppa glug pat.
    
    
12. What's the password? // Asi uppa abatyk skrihaisty?
    
    
13. Move there! // Asu fust idu vavi asi!
    
    
14. Attack! // Asu uppa zahaira!
    

Now, there might be at least one more pink sentence I wasn't able to figure out as well as a few inconsequencial variations to the existing ones (a few words might be interchangeable in some cases), however I don't think they are relevant in any way. Besides, technically, this is well over the 10 sentences required, according to the achievement's description.
However, if you find something I missed or feel like sharing your ideas, feel free to drop a message in the comments down below!

I'd like to say a big thank you to the creators of this guide, as it was of tremendous help in figuring out some of the words for pink sentences (a few of them are even mentioned there I believe), and it has the general meaning of most, if not all, words the game has to offer. https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=666816630