Batched notification in Icelandic language causes Velocity template error which is also included into notification

2019-02-15 16:45:06,308 Caesium-1-4 ERROR anonymous     [c.atlassian.velocity.DefaultVelocityManager] Exception getting message body from Velocity: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getText' in  class com.atlassian.jira.i18n.BackingI18n threw exception java.lang.IllegalArgumentException: Choice Pattern incorrect: 0#comentarii|1#comentariu1<comentarii at templates/email/batch/html/IssueUpdateBatcher-content.vm[line 204, column 47]
org.apache.velocity.exception.MethodInvocationException: Invocation of method 'getText' in  class com.atlassian.jira.i18n.BackingI18n threw exception java.lang.IllegalArgumentException: Choice Pattern incorrect: 0#comentarii|1#comentariu1<comentarii at templates/email/batch/html/IssueUpdateBatcher-content.vm[line 204, column 47]
	at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:337)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:284)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:262)
	at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:342)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
	at org.apache.velocity.runtime.directive.Parse.render(Parse.java:263)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
	at org.apache.velocity.runtime.directive.Parse.render(Parse.java:263)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:175)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336)
	at org.apache.velocity.runtime.RuntimeInstance.render(RuntimeInstance.java:1276)
	at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1215)
	at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1164)
	at org.apache.velocity.app.VelocityEngine.evaluate(VelocityEngine.java:219)
	at com.atlassian.velocity.DefaultVelocityManager.getEncodedBodyForContent(DefaultVelocityManager.java:205)
	at com.atlassian.jira.plugins.inform.batching.rendering.VelocityTemplate.render(VelocityTemplate.java:37)
	at com.atlassian.jira.plugins.inform.batching.rendering.VelocityTemplate.renderContent(VelocityTemplate.java:28)
	at com.atlassian.jira.plugins.inform.batching.BatcherServiceImpl.createEmail(BatcherServiceImpl.java:141)
	at com.atlassian.jira.plugins.inform.batching.cron.BatchNotificationJob.lambda$processEventBatch$3(BatchNotificationJob.java:162)
	at com.atlassian.jira.plugins.inform.performance.MeasurementProducer$MeasureWorkerBuilder$1.measure(MeasurementProducer.java:48)
	at com.atlassian.jira.plugins.inform.batching.cron.BatchNotificationJob.processEventBatch(BatchNotificationJob.java:136)
	at com.atlassian.jira.plugins.inform.batching.cron.BatchNotificationJob.lambda$notifyUsers$1(BatchNotificationJob.java:114)
	at com.atlassian.jira.plugins.inform.performance.MeasurementProducer$MeasureWorkerBuilder$1.measure(MeasurementProducer.java:48)
	at com.atlassian.jira.plugins.inform.batching.cron.BatchNotificationJob.notifyUsers(BatchNotificationJob.java:108)
	at com.atlassian.jira.plugins.inform.batching.cron.BatchNotificationJob.lambda$runJob$0(BatchNotificationJob.java:86)
	at com.atlassian.jira.plugins.inform.performance.MeasurementProducer$MeasureWorkerBuilder$1.measure(MeasurementProducer.java:48)
	at com.atlassian.jira.plugins.inform.batching.cron.BatchNotificationJob.runJob(BatchNotificationJob.java:84)
	at com.atlassian.jira.plugins.inform.batching.cron.ConditionalJobRunner.runJob(ConditionalJobRunner.java:33)
	at com.atlassian.jira.plugins.inform.batching.cron.ConditionalJobRunner.runJob(ConditionalJobRunner.java:33)
	at com.atlassian.jira.plugins.inform.batching.cron.OncePerClusterJobRunner.runJob(OncePerClusterJobRunner.java:46)
	at com.atlassian.scheduler.core.JobLauncher.runJob(JobLauncher.java:134)
	at com.atlassian.scheduler.core.JobLauncher.launchAndBuildResponse(JobLauncher.java:106)
	at com.atlassian.scheduler.core.JobLauncher.launch(JobLauncher.java:90)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.launchJob(CaesiumSchedulerService.java:435)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJob(CaesiumSchedulerService.java:430)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeClusteredJobWithRecoveryGuard(CaesiumSchedulerService.java:454)
	at com.atlassian.scheduler.caesium.impl.CaesiumSchedulerService.executeQueuedJob(CaesiumSchedulerService.java:382)
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeJob(SchedulerQueueWorker.java:66)
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.executeNextJob(SchedulerQueueWorker.java:60)
	at com.atlassian.scheduler.caesium.impl.SchedulerQueueWorker.run(SchedulerQueueWorker.java:35)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Choice Pattern incorrect: 0#comentarii|1#comentariu1<comentarii
	at java.text.MessageFormat.makeFormat(MessageFormat.java:1519)
	at java.text.MessageFormat.applyPattern(MessageFormat.java:479)
	at java.text.MessageFormat.<init>(MessageFormat.java:380)
	at com.atlassian.jira.i18n.BackingI18n.formatI18nMsg(BackingI18n.java:244)
	at com.atlassian.jira.i18n.BackingI18n.getText(BackingI18n.java:222)
	... 1 filtered
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:385)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:374)
	at com.atlassian.velocity.htmlsafe.introspection.AnnotationBoxingMethod.invoke(AnnotationBoxingMethod.java:24)
	at com.atlassian.velocity.htmlsafe.introspection.UnboxingMethod.invoke(UnboxingMethod.java:28)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:270)
	... 45 more
Caused by: java.lang.IllegalArgumentException
	at java.text.ChoiceFormat.applyPattern(ChoiceFormat.java:202)
	at java.text.ChoiceFormat.<init>(ChoiceFormat.java:315)
	at java.text.MessageFormat.makeFormat(MessageFormat.java:1516)
	... 57 more