My dts are a year now, and have just recently met my partner's family and are now spending quite a bit of time with them. In the last three weeks, they've prob spent a total of 6 days with them. His gran doesn't speak much english at all, so they tend to speak their own language, and I am wondering if the dts will pick it up or if it is going to be too little too late? DP speaks english to them at home since I don't understand gujarati.