1. A system to control discretion of a human reviewer of language translations, the system comprising: a computer comprising a processor and memory device operably connected to one another; a source text stored within the memory device and corresponding to a first language; a target text stored within the memory device and comprising a translation of the source text in a second language, distinct from the first language; and a plurality of executables stored on the memory device and executed by the processor, the plurality of executables comprising: a metric module identifying a test sample containing substantially less than all the source text and comprising one or more blocks, the metric module, wherein the one or more blocks each comprise a matched set having a source portion selected from the source text and a corresponding target portion selected from the target text, the metric module further comprising a block definer, block selector, and error identifier, the metric module, wherein the block definer controls the length of text forming the one or more blocks and determines the number of words contained within one of the source portion and target portion of at least one of the one or more blocks, the metric module, wherein the block selector controls selection of the one or more blocks and determines at random the location of one of the source portions and target portion within the source text of at least one of the one or more blocks, the metric module, wherein the error identifier defines error categories, each category thereof selected from an error in language translation to be detected if existing in the translation, an error reporting module constraining error reporting by a human reviewer of the translation by presenting to the human reviewer a listing of the error categories from which the human reviewer may exclusively select and report errors in the translation, an output module compiling the errors selected by the human reviewer for the test sample, and the output module further characterizing errors in the translation by scoring the quality of the translation.