I am not understanding your questions very clearly, but I will try to answer them a bit, for what it's worth:
Ina said:
Is it a valid assumption that a single language be it English, French, German, Chinese, can become the common working and communication platform for scientific research?
I think so, yes. In fact, I think English is the best suited for that, and has become that to a great extent. It can be used in concise and precise ways, and understood quite well even without a "native-level" mastery. No complex grammar, a rich vocabulary (including many words borrowed from other languages), a flexibility allowing for neologisms and expansion, no complicated tenses, no genders for nouns and adjectives, etc.
Others could apply too for other reasons, but they usually require more learning time for non-native speakers. AND, the prominent language is usually the language of the culture that predominates (Anglo-Saxon in our modern world); that's just what happens (sometimes for good, sometimes for bad, but it's a fact that people want to speak the language that is seen as the most profitable, "fashionable", "knowledgeable", etc.)
Do various sciences have language affinities to the point of native self expression?
Could you reword this question? I don't understand what you mean.
Has scientific research been politicized and commercialized just because of being done and conveyed in English?
I don't think so. Scientific research has been politicized and commercialized mostly due to how big corporations control it a lot of the time. It happens that in this time in History, those corporations are for the most part a part of the American government. But English is not the cause. If Japan was the world leader, and was doing to the world what the US has been doing, you can be pretty sure that scientific research (or anything else) spread widely would be done in Japanese for the most part. As long as we have people in power with no conscience, they'll use the language they have to manipulate. BUT, usually because of their lack of imagination and their wishful thinking, they can shoot themselves in the foot too (English also happens to be the most propagated language for independent researchers who are NOT into "politicizing and commercializing" their work. They do serious work. Journalists, scientists, teachers, you name it. And the Internet helps us get to know about them and their work, and do some REAL science.)
Is the current scientific creativity impasse an undesirable consequence of mere language?
I don't think so, although, to a certain extent, language does color the way we think and see the world. There are things that are not well expressed in English, for sure, just as there are many others not well expressed in other languages but perfectly well in English. I think the lack of creativity has nothing to do with the main language being used, but with how it has been stifled by our education system, by psychopaths (who lack creativity and want to make everyone stop thinking creatively too), wounding, programming, brain-washing, etc.
Just because a word, say, doesn't exist in English, it doesn't mean that you cannot IMAGINE the concept, or describe it in several words in English. There are many examples of so-called untranslatable words that come to mind (
hygge in Danish,
vergüenza ajena in Spanish, etc.) No single or two-word term can be used to translate those into English precisely, but a person can very well express the same meaning in a more complex sentence nonetheless.
The same applies to science. In fact, it's even easier there, because the subject being studied is, in most cases, observable and the terms often similar. Facts are facts, data is data. So, the language that is used to describe them is almost irrelevant as long as the truth behind the phenomenon being observed is preserved (THAT is what is often corrupted, distorted, twisted, etc., no matter the language!). But for that to be checked, ideally you have to have a common language to understand what others are saying and studying!
On the other hand, many people are potentially creative, smart and rigorous in their scientific work, but when they don't speak English, they become LESS useful to society at large. They are unable to complement their studies with a whole world of research done in English, they think they have the whole banana when someone else discovered the same thing 10 years ago, etc. (Yes, it does go both ways, but less so because there is usually more material in English than in other languages, at least for modern science). So, creativity can also be stifled by the LACK of English knowledge.
I see this almost every day, because I'm lucky to be fluent in three languages (Spanish being my mother tongue), and understand several others okay. Whenever I study something, I always look for at least what is being said on the topic in Spanish and French after reading what's available in English. Well, 98% of the time, I find myself reading translated works from English, or something that has already been said in English, or something that lacks a whole lot of data because the researcher in question doesn't know English! Once in a while, you find a great researcher who only publishes his or her works in their language (NOT English). But guess what? 99% of those times, they cite English sources, so you know they are able to open up and understand what is done out there! THEN, they make excellent analyses, they are creative, etc.
Perhaps a neurosurgeon is a scientist. If it is so what is the difference between a mathematician, a geophysicist and a neurosurgeon?
The objects/subjects they study, but you probably knew that already, so I don't understand your question.
If I could have a say in world-wide education (unlikely!), then I would promote the study of at least 4 languages from birth. There are many advantages to that (but it would be a bit off topic here). BUT, one of those 4 should be learned by everyone, native or not, and be used for science and much more, whenever it can be used and applied to the world at large. so that there is no Babel Tower, and no information is hidden for those who want to find it. So that people, instead of dealing with unnecessary linguistic miscommunication, could focus on learning about each other, caring for each other, and understanding universal truths. That's too much to ask given the current state of our world, but...
My 2 cents.