Your English has a Spanish shape. Here is where.

Spanish is syllable-timed: each syllable takes up roughly the same amount of time, giving speech an even, steady rhythm rather than English's stretchy, stress-timed pattern. Stressed syllables are a little louder and slightly longer, but unstressed vowels are never swallowed or flattened to 'uh' the way they often are in English, so every syllable stays clear and full.

When you speak Spanish, your mouth stays fairly compact and relaxed compared to English. The jaw doesn't drop as far, and the lips don't spread widely the way they do for English smiling-type vowels — everything stays close to neutral. The tongue rests a little forward, near the ridge behind your top teeth, because Spanish uses quick taps and trills of the tongue tip very often, as in the difference between 'pero' and 'perro'. Every vowel keeps its full, clear sound no matter where the stress falls — there's no lazy 'uh' sound the way English reduces unstressed vowels. Overall muscle tension stays even and moderate through each word, which is why Spanish feels smooth and rhythmically regular, almost like a string of evenly-sized beads, rather than the stretchier, uneven rhythm of English.