The most widely spoken (and likely the fastest spreading) world language today is English, with over 1.1 to 2 or 2.5 billion native and second-language users worldwide. On similar grounds, French ( Over 275 million people around the world speak French) is also commonly categorized as a world language. Other possible world languages include Spanish ( Over 572 million people speak Spanish worldwide, of which 477 million people are native speakers ), Arabic ( As many as 320 million people around the world speak Arabic ), Russian, and Mandarin Chinese.

Historically, AramaicAncient GreekLatinClassical ChinesePersianSanskrit, and Classical Arabic have also functioned as world languages due to their previous standings as lingua francas over large parts of the world.

The Indo-European languages are a large language family native to western and southern Eurasia. It comprises most of the languages of Europe together with those of the northern Indian subcontinent and the Iranian Plateau. A few of these languages, such as English, French, Portuguese and Spanish, have expanded through colonialism in the modern period and are now spoken across all continents. The Indo-European family is divided into several branches or sub-families, the largest of which are the Indo-IranianGermanicRomance, and Balto-Slavic groups. The most populous individual languages within them are SpanishEnglishHindustani (Hindi/Urdu), PortugueseBengaliMarathiPunjabi, and Russian, each with over 100 million speakers. GermanFrenchItalian, and Persian have more than 50 million each. In total, 46% of the world’s population (3.2 billion) speaks an Indo-European language as a first language, by far the highest of any language family. There are about 445 living Indo-European languages, according to the estimate by Ethnologue, with over two thirds (313) of them belonging to the Indo-Iranian branch.

List of languages by number of native speakers
This is an approximate list of languages by the total number of speakers. It lists 37 languages having more than 45 million speakers. Read more: https://wiki2.org/en/List_of_languages_by_total_number_of_speakers
‘Multilingual Education’
( UNESCO) The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations aimed at promoting world peace and security through international cooperation in education, the sciences, and cultureWikipedia
In 1999, at the 30th Session of UNESCO’s General Conference, countries adopted a Resolution that established the notion of ‘multilingual education’ (30 C/Res. 12) to refer to the use of at least three languages in education: the mother tongue(s), a regional or national language and an international language in education. 
Since then, UNESCO has been promoting, as and when relevant, multilingual education as a means to improve learning outcomes and give life to cultural diversity. English is the UNESCO number one international or World or Global Language.
The Future of World or Global or Second Language?
For how long English going to remain the Global Language?
Untile 2030, 2045, 2100, 2200, 2300, 2400 or more what is your best guess? ( )
Which language going to replace English? Franch, Spanish, Chinese,? ( )

What is the human ideal language?
Esperanto made by only one language expert to be the world’s second language. ( Now there are about 1 to 2 million people who know and use Esperanto after around 140 years only 10,000 speaks it fluently or) ( English has more than 1000 million fluent speakers with 12th grade and more)
( the following estimated for different definitions of “Esperanto speaker” in 1996:

  • 1,000 have Esperanto as their native language.
  • 10,000 speak it fluently.
  • 100,000 can use it actively.
  • 1,000,000 understand a large amount passively.
  • 10,000,000 have studied it to some extent at some time.

Let say in the ideal world all the people of the world, who believe, interested, and willing to make the ideal 1 world, or global the second language join to gather. Around 100 million of them pick 100/000 language professionals and from them 100 top best chosen as the organizer in charge. With accesses to the brain, computers, all resources with around 100 billion dollars budgets to create the best world language with %50 to %100 and more percentage better, to learn, memories for short times or for 100 plus years, use, comprehend, think with, talk with, read and write, the best for the brain, troths, tongs and most of the related organs in the body and the brain. way better for, arts, poetry, writing books, creativities, inventions, music, science, spirituality, economy, Also to translate all old and new languages. much better for computers and machines and many, many ways. but still takes lots of time to create and learn to use with 1000s of trillion dollars cost for all humans like 10s of years of global GDP only spend for that.
25 years to 10 million speakers, 50 years to 50 million, 100 years to 100 million few 100 years to few 100 years users so number one problems with that going to be human in few hundred years becomes way advanced so they going to create 1 or few new languages and start again new from a few people to million to 100 million in 100s year and again create a new one and this goes forever. Or really some genius peoples creates, (Like digital language or genetic language with 4 alphabets, or supercomputers) or Jesus Chriss or someone in his level comes with the power of Holy Spirits of God and creates one language for all humanity for all time for all users as a best of the best.
But any of these ideas almost impossible, so at least for the next few 100 years, English going to be with %80 to %90 of the possibility the world global second language for all humanity and UNESCO, only maybe with more availability, facilities, or be fixed or improve to %10 t0 %20 to %30 better, easier, faster to learn, memorize, comprehend and used. So at least for baby boomers and millennia, generation with 80 to 100 plus year life span English going to be the best of the best languages until 2050 and 2100 most useful for any human and for all humanity. If you know it, treasure and improve, or start to learn it or at least recommend and allow others to learn and use it for the benefits and betterment of all humanity.
The best idea

Language is one of the best for life. The best talent, skills, abilities, most useful,
For anyone with around 12th Grade in any language, costs are 100/000 to 500/000 dollars and from 10/000 to 20/000 learning hours in school and home. it is one of the costliest of things in life, time, money, and energy plus more.
It is sbr recommendation to everyone to treasure and care, improve language for all lifetime.
In this information age, with lots of new things, study or life long learning for 80 to 100 plus years for personal and Corriere
advancements are one of the necessities. To keep the mind busy and brain learning muscles active and strong for a long time (other than some breaks or vacations) ongoing study is the best. Other than priorities, continuing learning a language is the best option to keep mind and brain fit and ready for any other learning challenge.
All year 4 best and most useful function of language like listening, speaking, reading and writing continue education recommended. Like everyone goes each year to pass the test, receive recognition of his or her achievements also for next year lessons or courses or necessary learning materials, so that for 80 to 100 plus years ongoing or off and on, but always the best life long learning to improve skills for everything in life personally or professionally available to continue to make best of the best skills to the highest level possible. (never empty, lost, nothing to do, fear, worries, stress, or many other negativities of life).
People who practice spirituality daily or weekly have prays, reading holy books, listening, speaking, and some writing for all their lifetime. That’s the spiritual way and life longe learning is the intellectual way.
Officially or unofficially actively to be Life long language, literature, listening, speaking, reading, writing, arts, and cultures student with benefits in all levels, parts off identities, characters, and personalities for 80 to 100 years plus for life long better-living learning, working and socializing plus.
the best recommendation is 1, 2, 3, 4+ languages to learn, to know, and to use for the highest benefits.
To be locally and globally fit and ready for any challenges, higher education, travel, work, business, socializing.
1+ Official national language with the possibility of higher education
2+ Global English language or any of the top useful languages with the possibility of higher education
3+ Any or language of choices or maybe home languages
4+ Any or language of choices

Uncertainly and not being able to make the right decision 2 of the top 15 of the human problems globally.
Certainty, or to be sure for any percent especially for more %90 to 100% is the most valuable treasures.
From 7.8 billion living humans being only maybe around 1 to 2 billion people knows and accepted for sure that English is the world’s global second language.
Knowing which language was, is, and going to be the future world or global second language like for 2050 or 2100 plus is assurance and certainly the gifts of the highest value.
by knowing with certainty and to be sure that English is the world’s global second language for a very long time 6 to 7 billion humans can make better and right choices and decisions. (to be out of doubt, uncertainly, emptiness, nothing to do, mix up or still try to make or find to know or just waiting, vesting time, money, energy, all for nothing )
To improve 7.8 billion humans living, learning, working, socializing plus more learning English is one of the best solutions and one of the fundamentals also highest human rights.
or at least knowing, promoting, or let the other to learn and not by verbal or physical violence bothering them or just by any means being negative to them.

Inglish, Indiglish