How can we restrict changes made by the dictionary?

Sometimes the dictionary will affect other areas of the sentence and not just the word added. How can we control it?

 

Without my dic.

ENG

Updating your account information is easy. Follow these simple steps: 

PT
Atualizar suas informações de conta é fácil. Siga estes passos simples:

 

With Dictionary

ENG

Updating your account information is easy. Follow these simple steps: 

PT

Atualizando as informações Conta é fácil. Siga estes passos simples: (conta and estes are the words added)

 

How can we prevent this to happen?

 

I want to add the word of my dictionary but i dont want that change to start a different and wrong grammar construction int he target language.

 

Thanks,