"Low" in Spanish is "bajo." It is pronounced, "BAH-hoe." Sites such as learn-spanish.co.il provide audio pronunciations of many common Spanish words.
To say 'I have a microwave' in Spanish, you would say 'Tengo una microonda.'
To say 'I have a notebook' in Spanish, you would say 'Tengo un cuaderno.'
Precios bajos.
clase baja
To say 'furniture shop' in Spanish, you would say 'muebleria.'
In spanish it's triangulo. (tree-ann-goo-low)
To say 'rich' in Spanish, you would say 'rico.'
To say 'knives' in Spanish, you would say 'cuchillos.'
To say 'condensation' in Spanish, you would say 'condensación.'
To say 'evaporation' in Spanish, you would say 'evaporación.'
To say 'decompostion' in Spanish, you would say 'descomposición.'
You would say "español". It is not normally capitalized.