15. A device comprising: one or more processors; and data storage configured to store instructions executable by the one or more processors to cause the device to: receive a plurality of speech sounds that are each indicative of a different full pronunciation of a first linguistic term, wherein the first linguistic term includes a representation of one or more phonemes; determine concatenation features of the plurality of speech sounds of the first linguistic term, wherein the concatenation features are indicative of an acoustic transition between a first speech sound and a second speech sound when the first speech sound and the second speech sound are concatenated, wherein the first speech sound is included in the plurality of speech sounds of the first linguistic term and the second speech sound is indicative of a pronunciation of a second linguistic term; cluster, based on the concatenation features, the plurality of speech sounds into one or more clusters, wherein a given cluster includes one or more speech sounds of the plurality of speech sounds that have given concatenation features that are related by a clustering metric; and based on a determination that the first speech sound has the given concatenation features represented in the given cluster, provide a representative speech sound of the given cluster as the first speech sound when the first speech sound and the second speech sound are concatenated.
15. A device comprising: one or more processors; and data storage configured to store instructions executable by the one or more processors to cause the device to: receive a plurality of speech sounds that are each indicative of a different full pronunciation of a first linguistic term, wherein the first linguistic term includes a representation of one or more phonemes; determine concatenation features of the plurality of speech sounds of the first linguistic term, wherein the concatenation features are indicative of an acoustic transition between a first speech sound and a second speech sound when the first speech sound and the second speech sound are concatenated, wherein the first speech sound is included in the plurality of speech sounds of the first linguistic term and the second speech sound is indicative of a pronunciation of a second linguistic term; cluster, based on the concatenation features, the plurality of speech sounds into one or more clusters, wherein a given cluster includes one or more speech sounds of the plurality of speech sounds that have given concatenation features that are related by a clustering metric; and based on a determination that the first speech sound has the given concatenation features represented in the given cluster, provide a representative speech sound of the given cluster as the first speech sound when the first speech sound and the second speech sound are concatenated. 16. The device of claim 15 , wherein the instructions executable by the one or more processors further cause the device to: determine, based on the given concatenation features of the one or more speech sounds in the given cluster, a space representation of the given cluster that includes one or more dimensions, wherein a given dimension corresponds to one of the given concatenation features; determine a centroid of the given cluster, wherein the centroid is indicative of mean values of the given concatenation features in the one or more dimensions; and identify, from within the given cluster, the representative speech sound based on the representative speech sound having concatenation features with values that are at a minimum distance from the centroid compared to concatenation features of other speech sounds in the given cluster.