?Does "using Persian-English dictionary" have any disadvantage

[homeyra]

.But in my idea, the worst thing to do in learning English, is using Persian to English dictionary
.in my opinion, It ruins your writing, speaking
I believe that, it doesn't influence professional learners, but it poses bad effects on the advanced learners and lower levels
I think that, to learn how to speak fluently, one needs to grow an English mind;but if this process is accompanied by using Persian-English Dictionary he/she would not learn efficiently
?What do you think

what do you mean by growing our English mind? I mean how we can do this?l
And sometimes we really don't know some words in English....In this situation what should we do?l