Translation and cross-cultural adaptation of the therapeutic intervention manual Rapid Syllable Transition Treatment (ReST) into brazilian portuguese.

Purpose: To translate and culturally adapt the intervention manual "Rapid Syllable Transition Treatment (ReST)" into Brazilian Portuguese (PB).

Methods: The translation and linguistic adaptation process followed the criteria proposed by Beaton and Guillemin: Stage 1 - Translation; Stage 2 - Synthesis of translations; Stage 3 - Back translation; Stage 4 - Expert committee review; Stage 5 - Pilot study; and Stage 6 - Evaluation of records by the researcher and expert committee.

Results: In the adaptation stage, the need to modify terms and instructions translated into Portuguese by the translators for the clinical speech therapy context was shown for terms such as "beats," "sounds," and "smooth," as well as the adequacy of the choice of vowels, since in PB there is no schwa vowel [ə], and there is no possible "equivalence" for Portuguese.