The word Rostela is misspelled against Rostella, which is plural of "Rostellum"
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Rostella has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings roste & a which should not be misspelled with single 'L'
Wrong Spelling:  roste-l-a 
Correct Spelling:  roste-ll-a 
Find more incorrect spellings of Rostella to spell right way.