According to the spelling of the Spanish language, these expressions are used with the meaning of ‘immediately thereafter’ or ‘in a very short time’ and, although the spelling in two words is considered valid (right away)it is preferable to write it in a single word (immediately), since, according to the pan-Hispanic Dictionary of doubts, it is the most widely used.
Also in RAE: Writing in capital letters is equivalent to SCREAMING, explains the RAE
Thus, the following phrases found in the media are valid: «Although it opened at a difficult time, its opening was immediately noticed in the streets of the city» and «It immediately distinguished itself for acting decisively, boldly and quickly in the face of the crises”.
Also on TODAY: Environment, better than environment, advises the RAE
The entrance Immediately, in a word, more advisable than in two was first published on newspaper TODAY.
