Wikipedia has Simple English - https://simple.wikipedia.org/wiki/Simple_English_Wikipedia - maybe you're looking for something like that.
But the idea that we should be discouraging difficult words, or that this should be done at a browser level is terrible in many ways.
That we would use technology to intentionally dumb writing down.
Instead of using that same technology to provide definitions for less common words to people who might need them.
Is your goal to (try to) teach people new words, or to communicate your points?
Fancy words exist for a reason, and it's that their semantics are different from other words. Sometimes using a fancy word is the correct choice, and sometimes a more common word will do.
Synonyms don't actually mean the same thing as each other.
If I'm reading a text in French and I come across a word I don't know, I look it up. It's my second language after all. I certainly don't expect French authors to dumb anything down for me.
All of which isn't to say that people shouldn't occasionally step back and question whether they could convey the same thing without the jargon and fancy words, but frequently the answer is no, or at least not anything like as succinctly and clearly.
0. https://www.washingtonpost.com/news/answer-sheet/wp/2016/11/...
So you’re literally communicating less effectively when using a smaller vocabulary.
The best answer is to have the reader learn the difficult word, but that isn’t always possible.
A difficult needle to thread for sure.
Why don't web browsers discourage languages that not everyone will know?
Given the international nature of the web, wouldn't it make sense for web browsers to discourage you from using any language other than English? If you can write in English that most and more people would understand then why would you write in Punjabi, Mandarin, Xhosa, or Russian?
It's easy to forget, but things can be beautifully spoken in English. And, as with any other language, it can take some skill to perceive the beauty. Wouldn't it be wrong to modify browsers to effectively restrict the potential for that beauty? Given that the web is arguably the most popular communications platform, wouldn't restricting the use of English on the web place an unfair burden on native English speakers and on English literary culture?
In this day and age when we have access to multilingual online dictionaries, thesauri and even translators like Google Translate, discouraging unfamiliar words sounds extreme.
Look how dumbing down UI ended up: baby talk that means different things for different people and cultures, inappropriate, illogical skeuomorphisms, magic touch navigation that not everyone discovers.
Don't be part of any such effort.
Let me give an example of the inverse of this idea:
When I was 10 or so my mom had me read lord of the rings. She also gave me a dictionary to look up words I didn’t yet know. I learned so much. The resplendent delivery of my loquacious lexicon is beatific in its copious verbiage.
Momma dun learned me cuz I dint know words gud.
Today I keep a spreadsheet of "Words of Interest", where I make notes about words I encounter that I either don't know or find especially insightfully placed. Come to think of it, I wouldn't mind a decent dictionary app that allowed for making permanent personal annotations. Do you happen to know of one?
Instead of international… use “global” or “world wide”. Instead of make sense… use “be good”. Instead of discourage… use “put a stop to” or “warn off”. Etc. So many substations are necessary that it would just be better to rewrite the sentence.
For example “The web is used by many people in different places. Should apps warn you if you are using words that many people do not know?”
I had to substitute browser as it is a jargon word to many people. They just go online using their phone. They don’t know what is actually handling the data of the web page.
https://www.unsv.com/voanews/specialenglish/about/wordbook/V...
Instead, why not just look up those unfamiliar words? It's easy enough to do in most browsers – highlight the word, right click it, and then select Search [your default search engine] for '[word]'.
How do you define that?
It has never been easier and it enriches my language, why would I want to avoid that?
In fact, the browser can and does facilitate this very well. You can already just double click then right click and search on any word to get a definition, and I'm pretty sure there are dictionary extensions that make it even easier than having to go out to a search engine.