To think DP shouldn't have a say in how I use my phone?

[huispaus]

Spent 2 years living in a foreign country years ago, and recently, I've been feeling like I'm gradually starting to lose fluency in that language due to a lack of continued exposure/practice. To remedy this, I've decided to change the native language for all my devices/apps from English to Russian.

Here's the problem: DP is now accusing me of "hiding things" since she doesn't read Cyrillic! I've tried to explain my reasoning for doing so a fair few times and she has dismissed them all, saying that I was merely "making excuses for god know's what".

AIBU to think that I should be free to use my phone however I please?

Those who say "Oh, but love is about making your partner happy" did you miss the bit where the OPs partner is actually accusing him of deliberately hiding things and "making excuses for god knows what"? This is not "I know I am insecure, but could you do this to make me feel better?". This is actually accusing someone (who as far as we know has never given cause) of lying and cheating.

For me, and I suspect for many people, that would be a dealbreaker.

Another thing is, how "normal" is it for a DP to want to go through your phone?

As previous posters have said, it's not normal. I will sometimes show my OH something on my phone and him vice versa. But neither of us pick up each other's phone and scroll through the message, internet history etc etc.

To answer your question, it's not normal to want to go through each other's phones. DH and I know each other's PINs and will ask to use them if we want to google something and our phone isn't to hand, but I would be very unhappy if he checked my PMs.

I also don't felt that the next partner should suffer the consequences of a previous cheating partner. I went out with somebody who had been cheated on and he would get a bit jealous sometimes - I didn't pander to his insecurities and he got over it!

I also don't felt that the next partner should suffer the consequences of a previous cheating partner.

This. Her history is hers to get over, not yours to pander to.