Is the word decidir the same in Brazilian and European Portuguese?

No. While the spelling and core meaning of "decidir" are identical, there are differences in grammar, usage, and pronunciation.

• Grammar: Brazilian Portuguese favors proclisis (placing object pronouns before the verb, e.g., "eu me decidi"), whereas European Portuguese favors enclisis (placing pronouns after the verb, e.g., "eu decidi-me").
• Usage: The subject pronouns used to address people differ; Brazilians typically use "você" (e.g., "você decidiu"), while Portuguese people often use "tu" (e.g., "tu decidiste"). Additionally, Brazilians may use "decidir" in contexts where a Portuguese person would more naturally use "resolver" (to resolve or solve).
• Pronunciation: In most Brazilian dialects, the syllable "di" is palatalized, sounding like "dji" [dʒi]. In Portugal, it remains a dental "d" [di].

Brazilian Portuguese Examples

1. Eu vou decidir esse problema agora. (I am going to decide/solve this problem now.)
2. Ela decidiu não vir à festa. (She decided not to come to the party.)

• Nós decidimos o que fazer no final de semana. (We decided what to do on the weekend.)

4. Você já decidiu o que vai comprar? (Have you already decided what you are going to buy?)
5. Eu me decidi pelo modelo azul. (I decided on the blue model.)

European Portuguese Examples

1. Eu vou resolver este problema agora. (I am going to solve this problem now.)
2. Ela decidiu não vir à festa. (She decided not to come to the party.)
3. Nós decidimos o que fazer no fim de semana. (We decided what to do at the weekend.)
4. Já decidiste o que vais comprar? (Have you already decided what you are going to buy?)
5. Eu decidi-me pelo modelo azul. (I decided on the blue model.)