Interesting list.
There seem to be a couple of different categories of things in your list:
o Words that do not have one-to-one mapping:
(Exampels are English -> Portuguese)
“to be” -> “ser”, “estar”
“ear” -> “ouvido”, “orelha”
“do”, “make” -> “fazer”
“he”, “she”, “it” -> “ele”, “ela”
And many more!
o Unfamiliar verb forms: subjunctive, formal “you”/informal “you”, etc.
o Dialects: In Rio de Janeiro, “Você está bem?” (“Are you ok?”) would quite likely be spoken as “Cê tá bem?”
I’ll throw in a couple more:
o Gender: If you speak Spanish, you know the drill: most words are obvious, but then you encounter a word that doesn’t end in “o” or “a”, or worse, a word such as “mapa” that is deceptive.
o Pronunciation: Spanish doesn’t have this as bad – what you see is what you get. Portuguese (like English) has multiple sounds for each vowel, and the vowel sounds are not always indicated by accents. This causes me endless frustration (is “inveja” (envy) spoken with a closed “e”, like “late”, or an open “e”, like “let”?)
In general, it appears that there’s two great classes of language annoyances: Stuff that you can learn once and for all, and stuff that you have to learn anew for each and every word or expression
In the former category:
o New verb tenses
o New sounds
o Regional pronunciation (if you stay in one region
)
In the latter category:
o Gender
o Spelling (in English :()
o Idiomatic expressions
o Pronunciation
I personally do not have many problems with the learn-it-once category. If you speak a language long enough and have the dedication to study some arcane rules once in awhile, that stuff is learnable.
I get frustrated often by the never-ending toil involved in constantly learning each new case in the latter category.
It’s particularly discouraging when one realizes that most children have far more mastery in the second section than a nonnative speaker ever will. It seems that no matter how one tries, one can never exceed the language skill of a grade-school child. (not counting, of course, non-language-specific skills such as abstract thought and rhetoric).