Cross-legged

彼女は1時間は座ってられるけど、足が曲げられず、まっすぐ力が入ってしまうのが課題だった。

She could sit for an hour, but the challenge was that she couldn't bend her legs and was straightened.

最近は彼女が自分で曲げられて遊んだりできるようになってきた。

Recently she has become able to bend and play on her own.

足が短くてまだ胡座はかけないけどね。

She has short legs and hasn't put on a sword yet.