One thing that struck me as odd is the interview he did explaining his new sonic screwdriver. He said it has a Rwandan proverb written in Galefreyan on it. I mean, why? We know Ncuti was born there but the Dr. sure wasnt. It's weird and in your face and i dunno.. I don't know why that's required. It's not like any other doctor had 'many hands make light work' written down the shaft of their sonics lol. This is the sort of thing that has me just check out. It's not having characters of different genders or sexual orientation - none of that is ever a problem, it's the weird unnecessary references and snipes at the doctor 'It's a shame you're not a female any more, she'd understand'. If that was flipped, the bbc would be inundated with complains and rightly so. [Rose] "something a male-presenting Time Lord will never understand" <---- See, there's something off about the Doc, who just spent hundreds (if not thousands) of years as a woman, being told that by a 15 year old transgender girl [That's how old Rose is supposed to be during 'The Star Beast'. The audacity to suggest that child knows more than the Doc ever would
This is the sort of crap that ruins entire franchises.
It's a tradition in film, TV and theatre for props and has been something done in film and TV basically since the first moving pictures to personalise/have fun with props.
Probably a holdover to some extent from the days that people often supplied their own props/clothes from their own collection, and there are very well documented examples of it in Sci-fi going back to the early Star Trek, and TNG.
Basically it's something that a prop maker will do because no one usually notices but adds some fun and thought into it, it also when you're dealing with a made up sci fi language helps you retain an internal consistency as you can either make a random load of squiggles, or you can use quote or proverb etc that is relevant in some way, such as it references the person who has made the prop or is going to use it.
IIRC a lot of the previous Doctors have had props personalised to their past work/background, and from memory every reincarnation of the Doctor (at least since it came back) has had their own version of the screwdriver.
Also the Doctor is explicitly said to know what was it, millions of languages in the previous episode, given how much time he's spent on earth and specifically without the Tardis on earth in the past it's not beyond any further suspension of disbelief that he knows not only English, but multiple other Earth languages and might at some point have liked a phrase enough to use it for a while.
It's certainly better than having random squiggles or "davros is a poopy head" sort of thing as is often the case in made up sci fi languages.
I actually take this sort of attention to detail as reassuring, it indicates that people making Doctor Who are trying to sort out at least some aspects of consistency, which for background detail like languages that are used repeatedly is a very good thing, as it means you're less likely to see a random set of squiggles in one episode and it mean "danger" and again in another episode when a sign gets reused but this time it's taken to mean "Eat at Joes".
And if you think having a Rwandan proverb in a made up language is bad on a prop that you can't even make out clearly, then boy have I got some bad news for you about Star Trek, where it's been a very long running joke for pretty much every display screen, nameplate, small tag on a bucket to have a joke text, often intended to try and make the cast/crew laugh and referencing everything from how wordy a treaty is, to the names of cast/crew, their previous work, or random pop culture references, and all in plain english (IIRC there is/was a site that specifically tracked the references in TNG that were visible when they rereleased it in HD). One of my favourites is how Cetacean Ops, a joke reference to an 80's anime* which in itself was a reference to a David Brin book, went from a call on a the PA system in an episode of star trek and then mentioned in one of the tech manuals, to actually being depicted on screen at least once (lower decks had Boimler visit it from memory).
*The rather good Gunbuster where Dolphins and Whales given artificial voices and implants were used as deep space navigators.
