Add multilingual language and systems learning tracks

ceb/basic-practice-20261101/lesson-3/main.bas

@@ -0,0 +1,9 @@
+10 LET T=4
+20 LET D=5
+30 GOSUB 200
+40 IF R<>0 THEN PRINT "Test failed"
+50 IF R=0 THEN PRINT "Nipasar"
+60 SYSTEM
+200 LET R=T-D
+210 IF R<0 THEN LET R=0
+220 RETURN