I hope I've picked up the correct crochet instructions from the correct pattern. If not, then apply what appears here to the correct pattern:
Crochet 1 row of sc along the back opening and the neckline
translation: sc = single crochet
Crochet 2 nd row of dc.
translation: dc = double crochet
Row 3: 3 dc in 1 dc from the row 3, skip 1 dc, 1 sc, skip 1 dc
translation: a) just as in knitting, repeat the steps between the * * as many times as indicated or until the end of the row.
b) 3 double crochet stitches in 1 double crochet from row 3, skip 1 double crochet, make 1 single crochet, skip 1 double crochet--this makes the lace-like pattern that you can see on the edge
repeat along the neckline.
translation: Do the same thing along the neckline.
Crochet sc along the right back, crochet sc along the left back making 8 button loop crochet ch 3 evenly.
translation: I think you have the picture now, but be sure and allow for 8 evenly spaced button loops (maybe mark the locations ahead of time with stitch markers). Make the loops between consecutive single crochet stitches by creating 3 chain stitches and leaving the 3 ch sts when you crochet into the next single crochet.
Crochet 1 row of sc arond the arm openings.
translation: Except for the misspelling of "around," this should be clearer now.
Row 2: 3 dc in 1 dc from the row 3, skip 1 dc, 1 sc, skip 1 dc repeat along the arm opening.
translation: This is like Row 3 along the back and neck opening.
Please know that the pattern instructions are poorly organized and not well written. The row numbers aren't all that clear, esp. if you're not experienced in crochet. But you'll be OK, since you are an experienced knitter and the concept of "rows" is strong!