I see from your other thread that you are planning a multi-year adventure that takes you to a lot of different places. After a while you'll learn how to cope. Sign language, a few of the essential local words, English. You'll find that in a lot of places it won't be that hard to find someone who has at least a smattering of English, especially in places that get a lot of visitors.
Your list begins with a lot of countries that do not use Roman alphabets. If the language issue is going to be a part of your comfort zone, then you might want to start with either Europe or South America, where you can read the street signs and where there will be a lot of language cognates you can recognize. Where you'll have fewer problems communicating that you need a place to stay, some bananas, or a toilet.
I talk about this comfort zone, because when I first began to travel, one of the things I worried about was the language barrier. My first trip out of the US (other than some border towns) was to Europe--the UK plus Germany & Austria, since I had studied German in school and I figured I'd be happier if I could communicate. It was the right approach for me. I learned to feel a lot more comfortable about travel and communication. Had my first trip been to, say, China, I would have been overwhelmed.
As you become more familiar with the rhythms of your travel, you'll find yourself having a great time in some bar in a country where you can neither read nor understand a word of the local language.
try and learn a few basic languages
Are you someone who picks up languages easily? How fluent would you like to be? One possibility would be to take a local language course in some place that appeals to you & where you'd like to stay for a few weeks. Another would be to study a European language such as Spanish or French before you leave. Not just to learn the language, but to discover how language learning works for you. If you find it easy or difficult to learn a new language. , what kind of study seems to work for you.