Whatever you want to say, just say it. Even if the grammar is “wrong”, there’s an excellent chance that you will be understood. This website offers you the choice to speak English with none or some of the exceptions to the basic rules of grammar. You can choose the exceptions that you want to use, and when to start using them. The choices are yours.
Intish could mean Introductory English, where a learner can start speaking with a grammar that has no exceptions to the basic rules.
Intish could also mean International English, and with little doubt that English is now the world’s international language with at least twice as many second-language speakers of English as there are first-language speakers, the rate of change to the rules of grammar could increase, most likely to make things easier.
All living languages change, and over the centuries, the complex grammar patterns that still exist in many European languages have reduced significantly in English. Changes come about with speakers doing things “incorrectly” until they become correct. Fifty years ago, it was considered incorrect to say It’s him, the “correct” form being It’s he, which now sounds too formal.
Many regard writing as being more formal than speaking, and for business communication and the like, that is generally the case. It doesn’t need to be that way, and in fact, writing anything as you would say it can be just as effective. One advantage with writing is that there is time to check grammar and spelling, but unless it’s important, don’t spend too much time on it. For communication, it’s just not worth it.
This post was revised in 2017 May 04 with a complete revision to this website, with further revisions until May 29.