Funny associations and more about bilingualism

It is so interesting to watch the way his vocabulary expands. Every day new words, new sentences, new associations.
There are some of the latter which I find very funny:

- Cai (he repeats this name every time he sees a dog in association with Cali, his grand parent's big, black dog)
-Myna ( he says every time he sees a big SUV just as the one his grand parents have or when he says somebody playing an instrument, just as Myrna's husband, Dan is doing)
- Mami (every time he sees a woman saying something on youtube or when he sees a PT cruise, the car his "mami" is driving
- same for "Tati" ;
- "two" for every number we're counting;
In terms of bilingualism, he still chooses to say the easiest words from each language: he will say "blue" but not "albastru". LOL, it's kind of hard.
I'm thinking going to pre-school 3 days a week/ 4 hours a day helps in acquiring more English language skills: all his sentences are so far in English and none in Romanian.
He says: "I want apa", I want eat", "I want house", "I built house", "I want hat", "I want mami", "I want car"(car) etc
Although, there's no palpable evidence of actually saying more Romanian words, I feel his Romanian vocabulary evolved as well, especially at an understanding level, as I talk to him in more elaborate sentences than before and he answers positively by letting me know he understands what I'm talking about.
My strategy is to obviously continue talking to him in Romanian and every time he asks something in English, I ALWAYS reply to him in Romanian.

Edit: this week our friend,Sho, came by for a playdate. He also comes from a bilingual family: his mother is Japanese and his father is Afro-American. I remember reading in the bilingual books I've mentioned earlier in my posts, that there is no evidence bilingual kids would start talking later than monolingual kids. I have to say I was skeptical about it, as all the bilingual I've met so far started talking way later than their monolingual peers. Well, Sho changed my opinion, as he's not even 2 yo and he already speaks a lot of words in both English and Japanese. He's not yet fluent in any of the languages, nor does he make any sentences but he says way more words than Bryce, my son, for example says at 27 months.
As I wrote before this is an on going process, so I'll keep updating as the days, weeks go by.