To a Western ear, the most predictable of language traits, perhaps, is the well-advertised Japanese use of r for our l .  Indeed, in my travels about Honshu during a three-month visit, I did hear  coinrocker,   see you rater,   Adurt Graphics  (dirty books),  blackwrrants  (hit-and-miss rendering of black walnuts),  Coffee Corombia  (a chain of coffee shops), and  Coconut Glove. 
( ( ( ( ( To ( ( ( a ( Western ear ) ) , ) ( ( the ( most predictable ) ) ( of ( language traits ) ) ) ) ) ( , ( perhaps ( , ( is ( ( the ( well-advertised ( Japanese use ) ) ) ( of ( r ( for ( our ( l ( . Indeed ) ) ) ) ) ) ) ) ) ) ) ) , ) ( ( in ( ( my travels ) ( about ( Honshu ( during ( a ( three-month visit ) ) ) ) ) ) ) ( , ( I ( did ( hear coinrocker ) ) ) ) ) ) ( , ( ( ( see you ) ( ( rater , ) ( ( ( ( ( ( ( ( ( Adurt Graphics ) ( -LRB- ( ( dirty books ) -RRB- ) ) ) , ) ( blackwrrants ( -LRB- ( ( ( hit-and-miss rendering ) ( of ( black walnuts ) ) ) -RRB- ) ) ) ) , ) ( ( Coffee Corombia ) ( -LRB- ( ( ( a chain ) ( of ( coffee shops ) ) ) -RRB- ) ) ) ) , ) and ) ( Coconut Glove ) ) ) ) . ) ) )
(ROOT (SINV (S (S (PP (TO To) (NP (NP (DT a) (JJ Western) (NN ear)) (, ,) (NP (NP (DT the) (ADJP (RBS most) (JJ predictable))) (PP (IN of) (NP (NN language) (NNS traits)))))) (, ,) (ADVP (RB perhaps)) (, ,) (VP (VBZ is) (NP (NP (DT the) (JJ well-advertised) (JJ Japanese) (NN use)) (PP (IN of) (NP (NP (SYM r)) (PP (IN for) (NP (PRP$ our) (NNP l) (. .) (NN Indeed)))))))) (, ,) (S (PP (IN in) (NP (NP (PRP$ my) (NNS travels)) (PP (IN about) (NP (NP (NNP Honshu)) (PP (IN during) (NP (DT a) (JJ three-month) (NN visit))))))) (, ,) (NP (PRP I)) (VP (VBD did) (VP (VB hear) (NP (NN coinrocker)))))) (, ,) (VP (VBP see) (NP (PRP you))) (NP (NP (NN rater)) (, ,) (NP (NP (NP (NNP Adurt) (NNP Graphics)) (PRN (-LRB- -LRB-) (NP (JJ dirty) (NNS books)) (-RRB- -RRB-))) (, ,) (NP (NP (NNS blackwrrants)) (PRN (-LRB- -LRB-) (NP (NP (JJ hit-and-miss) (NN rendering)) (PP (IN of) (NP (JJ black) (NNS walnuts)))) (-RRB- -RRB-))) (, ,) (NP (NP (NNP Coffee) (NNP Corombia)) (PRN (-LRB- -LRB-) (NP (NP (DT a) (NN chain)) (PP (IN of) (NP (NN coffee) (NNS shops)))) (-RRB- -RRB-))) (, ,) (CC and) (NP (NNP Coconut) (NNP Glove)))) (. .)))
There are many sounds that non-native speakers can not differentiate.
( There ( ( are ( many ( sounds ( that ( ( non-native speakers ) ( ( can not ) differentiate ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (ADJP (JJ many) (SBAR (S (VP (VBZ sounds) (SBAR (IN that) (S (NP (JJ non-native) (NNS speakers)) (VP (MD can) (RB not) (VP (VB differentiate)))))))))) (. .)))