当然是Basque language了肯定是说该语言是欧洲最古老的语言之一，不大可能说语言的起源是欧洲最古老的起源之一……而且一般而言，同位语与被它限定的词常常紧挨在一起。 我还维基百科了一下，里面有这样一条信息However, popular stereotypes characterizing Basque as "the oldest language in Europe" and "unique among the world's languages" may be misunderstood and lead to erroneous assumptions所以综上所述，language为正解...
