Language learning and music perception require related auditory processing skills.
The early developing brain processes language as a type of music. Infant-directed speech is often described as musical speech (using several variations in pitch).
In children ages 4 to 5 years old, a direct relationship exists between pitch discrimination and phonemic awareness abilities. Just as pitches and notes form the building blocks of music, phonemes (individual sounds within a word), syllables, and words form the building blocks of phonological awareness, the essential foundation for language and reading skills.
In particular, music has been shown to help increase the following phonological awareness skills: rhyming, segmenting, and blending.
Reference: Dedge and Schwarzer, 2011 (https://www.frontiersin.org/articles/10.3389/fpsyg.2011.00124/full)