The word Vala is misspelled against Valla, which is plural of "Vallum"
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Valla has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings va & a which should not be misspelled with single 'L'
Wrong Spelling:  va-l-a 
Correct Spelling:  va-ll-a 
Browse incorrect spellings of Valla to spell it good.