Earlier quoted context omitted.
No, it isn't just a matter of orthography. English has no future tense on any reasonable analysis. There is no unit of English syntax which (i) behaves like a verb and (ii) has a distinct future form. This is a completely uncontroversial point. See e.g. http://languagelog.ldc.upenn.edu/nll/?p=897 for further discussion. > If we define words as the unit that carries a single beat in speaking Note that this definition…
> There is no unit of English syntax which (i) behaves like a verb and (ii) has a distinct future form. This seems like an arbitrary and peculiar way to define tense specifically to exclude periphrastic languages like English. If these are the rules by which we are arguing, the argument doesn't seem that interesting. By this argument colloquial French and German have no past tense because they use periphrastic constr…
Tense is a piece of technical terminology with a particular definition. There's nothing very peculiar about the definition that I can see. The definition denies English a future tense because English doesn't have periphrastic units which (i) behave like verbs and (ii) have a distinct future form.
For whatever reason, people are really resistant to taking linguists' word for it on what technical terms within linguistics mean. You don't find people on here trying to argue with physicists about whether they should maybe adopt a different definition of "force" or "mass" or "electron".