There are .mo and .po files that are usually placed in wp-content/languages/themes/, however, although po is a text file, mo is not. You should use translation plugin like “Loco Translate” by Tim Whitlock, and edit them elegantly yourself.
You can translate entire themes and later contribute .mo and .po files as updated translation to the author if you so wish.
One note, “My Account” may not at all be a part of the SparkleStore theme, but from another plugin. Fortunately, Loco Translate can be used to translate these too.