I had this problem after an extended time in South America. Learning Portuguese almost totally destroyed my spoken Spanish, even though I can still read it fine.  I even had to stop some &quot;carioca&quot; accent features because they were making it into Spanish.<p>P.S.  You may find it useful that &quot;since 8 years&quot; is awkward in English, &quot;for 8 years&quot; would be preferred.